6502 emulator on ATmega328P
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LED Matrix Support
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I2C Support
Program should start at 0x8000, and its size shouldn't exceed 0x2000 bytes.
| Segment | Start Address | Size |
|---|---|---|
| TEXT | 0x8000 | 0x2000 |
| HOST FUNCTIONS | 0x5000 | 0x3000 |
| KEY | 0x4000 | 0x1000 |
| LED | 0x2000 | 0x2000 |
| BLANK1 | 0x800 | 0x1800 |
| RAM | 0x200 | 0x600 |
| STACK | 0x100 | 0x100 |
| RESERVED | 0x0 | 0x100 |
each LED has 8 bytes: STATUS R G B HL HI V
Note: Each hue has two bytes with lower 8 bits first.
This segment contains useful functions for subsystem to use
0x5000 DELAY_DATA_CTRL 0x5001 DELAY_DATA_LSB 0x5002 DELAY_DATA_MSB
Set DELAY_DATA_CTRL to 1 to pause subsystem After the pause, host will set DELAY_DATA_CTRL to 0
6502 cpu implementation: fake6502
Online assembler: ASM80